The United States Naval Academy in Annapolis, Maryland, was placed on lockdown Thursday after reports of threats prompted authorities to clear a building and secure the campus, officials said.
One person was injured during the response and was airlifted to a hospital in stable condition, Lt. Naweed Lemar, a spokesperson for the base that hosts the academy, said in a statement. By early Friday, Lemar said the lockdown had been lifted and the academy had "been given the all clear."
Naval Support Activity Annapolis security personnel and local law enforcement officers responded to reports of suspicious activity, Lemar said. Police were seen near Bancroft Hall, the academy dormitory that houses more than 1,600 midshipmen and is described on the school's website as the largest single college dormitory in the world.
Officials said the academy went into lockdown "out of an abundance of caution." Additional details about the nature of the threat, how the person was injured and whether any suspects were identified were not immediately available. Authorities did not release further information on the victim's condition beyond the statement that the person was stable.
The Naval Academy, a federal service academy that trains officers for the U.S. Navy and Marine Corps, periodically institutes heightened security measures in response to threats or suspicious activity. In this instance, security forces worked with local law enforcement to clear the affected building and secure campus grounds before lifting the lockdown early Friday.
Officials said the situation was contained and the academy resumed normal operations after the all-clear was given. Investigators with Naval Support Activity Annapolis and local police were handling inquiries into the incident and had not released a timeline for when more information would be available.